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Photonics Research, Volume. 5, Issue 5, 521(2017)

On-chip silicon photonic 2 × 2 mode- and polarization-selective switch with low inter-modal crosstalk

Yong Zhang, Yu He, Qingming Zhu, Ciyuan Qiu, and Yikai Su*
Author Affiliations
  • State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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    Schematic configuration of the 2×2 MPSS for two modes and two polarizations. As an example, the TE0 and TE1 channels of Input 1 and the TM0 and TM1 channels of Input 2 are routed to Output 1 and other channels are routed to Output 2. The calculated mode patterns of the TE0, TE1, TM0, and TM1 modes are intensity profiles. The intensity profiles of the TM0 and TM1 modes look like second-order TM modes in the normal direction. It is attributed to the small height (220 nm) of the silicon waveguides.

    Fig. 1. Schematic configuration of the 2×2 MPSS for two modes and two polarizations. As an example, the TE0 and TE1 channels of Input 1 and the TM0 and TM1 channels of Input 2 are routed to Output 1 and other channels are routed to Output 2. The calculated mode patterns of the TE0, TE1, TM0, and TM1 modes are intensity profiles. The intensity profiles of the TM0 and TM1 modes look like second-order TM modes in the normal direction. It is attributed to the small height (220 nm) of the silicon waveguides.

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    Basic elements of the 2×2 MPSS. (a) A PBS and a mode multiplexer; (b) a waveguide crossing; (c) a 1×2 MMI; (d) an MZI switch.

    Fig. 2. Basic elements of the 2×2 MPSS. (a) A PBS and a mode multiplexer; (b) a waveguide crossing; (c) a 1×2 MMI; (d) an MZI switch.

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    (a) Microscope photo of a fabricated MPSS chip. (b) Magnified SEM images and microscope photos of a PBS, a mode multiplexer, waveguide crossings, and an MZI switch.

    Fig. 3. (a) Microscope photo of a fabricated MPSS chip. (b) Magnified SEM images and microscope photos of a PBS, a mode multiplexer, waveguide crossings, and an MZI switch.

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    Measured inter-modal crosstalk performance.

    Fig. 4. Measured inter-modal crosstalk performance.

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    Measured intra-modal crosstalk performance.

    Fig. 5. Measured intra-modal crosstalk performance.

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    • Table 1. Measured Performance of Building Blocks

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      Table 1. Measured Performance of Building Blocks

      Building BlockInsertion Loss (dB)Crosstalk (dB)
      PBS for TE00.54−22
      PBS for TM00.83−24
      Mode multiplexer for TE11.6−18
      Mode multiplexer for TM11.32−23
      Crossing for TE00.09−35
      Crossing for TM00.12−30
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    Yong Zhang, Yu He, Qingming Zhu, Ciyuan Qiu, Yikai Su, "On-chip silicon photonic 2 × 2 mode- and polarization-selective switch with low inter-modal crosstalk," Photonics Res. 5, 521 (2017)

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    Paper Information

    Category: Silicon Photonics

    Received: Jun. 16, 2017

    Accepted: Aug. 23, 2017

    Published Online: Sep. 30, 2017

    The Author Email: Yikai Su (yikaisu@sjtu.edu.cn)

    DOI:10.1364/PRJ.5.000521

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology